Everything was great

It felt okay overall, and people in Sydney seemed generally nicer than those in Melbourne. I got a free upgrade to a Mitsubishi Outlander when picking up the car, but during the inspection, I noticed a nail in the tire. They replaced it with a Nissan X-Trail instead. When returning the car, I was worried that their 8 AM opening time might be too late, so I followed the instructions at their office to return the car at the Andrew parking lot next door, only to find they charged me AUD 45. I was speechless, but the service itself was fine. In hindsight, waiting for Apex to open and returning it there would have made no difference in reaching the airport on time. I suggest choosing basic insurance and then upgrading to full coverage for AUD 349 at the car rental location—the total cost is roughly the same. PS: Roadside assistance will cost AUD 250 regardless of the situation. Parking fines are very expensive, so make sure to follow traffic rules and check the signs!

After arriving at Sydney Airport's T1 International Terminal, there is a shuttle loop to the parking building. The paperwork is processed instantly on-site, and you can pick up the car directly within five minutes. Returning the vehicle is also quick and hassle-free with on-site processing.

Very satisfied, both picking up and dropping off the car were quick and smooth. The front desk staff patiently explained the model and insurance options I had booked and asked if I needed to pay for bridge tolls and other essential questions. Besides requesting the bridge toll service, I also opted for zero-deductible insurance. Everything was quick and convenient.
When returning the car, I mentioned to the front desk that I had accidentally scratched it during the rental period. After asking when and where it happened, they just had me sign a form, and that was it. This is the importance of full insurance.

Very good, the staff were enthusiastic and processed everything promptly. Any issues were resolved quickly.

Car was great but we had an early international flight and it was a hassle, almost missed our trip back to the US because the office was not opened before 8am and we had to go to another location to drop the car (and wait 30+ minutes for the next shuttle). Otherwise all was great, loved the car, the support staff was really good, just that drop off and not knowing that we could not drop off early was a pain.